COMP Cams Explains the Pros and Cons of Solid, Hydraulic, Flat-Tappet, and Roller Cams, and the Advanced Technology that makes them all Work. With horsepower seemingly growing on trees these days, ...

Picking the right valvetrain for your engine can be a daunting task. Solid flat tappet, hydraulic flat tappet, solid roller, hydraulic roller; these are the choices, made even more difficult due to ...

At the very least, tearing down, inspecting, and cleaning hydraulic lifters is good engine hygiene that can contribute to long service life in your classic car. It’s also a great way to inspect the ...

"Bullwinkle, that trick never works. Why don't you figure out how to make hydraulic roller lifters survive big spring pressure." "Huh?" Like Bullwinkle, hydraulic roller lifters get no respect. It ...

The Cummins 6.7L turbo diesel engine entered its fifth generation in 2019. In addition to improved output of up to 400 horsepower and 1,000 pound-feet of torque, the new engine's valve train featured ...